H9" Outdoor Unit: Malfunction Of Thermistor (R1T) For Outdoor Air - Daikin RTSQ20PY1 Service Manual

Troubleshooting by Indication on the Remote Controller
H9
4.24 " " Outdoor Unit: Malfunction of Thermistor (R1T) for
Outdoor Air
H9
Remote
Controller
Display
Applicable RTSQ8P~16P (Outdoor Unit)
Models
Method of Malfunction is detected from the temperature detected by the outdoor air thermistor.
Malfunction
Detection
Malfunction When the outdoor air temperature thermistor has short circuit or open circuit.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
261
Defective thermistor connection
Defect of outdoor air thermistor (R1T)
Defect of outdoor unit PCB (A1P)
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Connector is
connected to X18A
of outdoor PCB
(A1P).
YES
Resistance is normal
when measured after
disconnecting the
thermistor (R1T) from the
outdoor unit PCB. (1.8kΩ
to 800kΩ)
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.408.
NO
NO
SiBE31-801_C
Connect the connector and turn on
again.
Replace the thermistor (R1T)
Replace the outdoor unit PCB
(A1P).
Troubleshooting